Implement proprietary lenovo ACPI hotkeys Change-Id: I36a6d3a280b0ac76d9ea063cdc10197a57e306f9 Signed-off-by: Vladimir Serbinenko <phcoder@gmail.com> Reviewed-on: http://review.coreboot.org/4055 Tested-by: build bot (Jenkins) Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>